Atlas Copco GA 37 VSD Instruction Book page 116

Fault Text on
code converter
display
21 O.ht1
22 O.ht2
24 th
27 O.ht3
32 PH
102 O.ht4
(blank) (blank)
114
Cause
Converter overheating (IGBT)
Converter overheating (heat sink)
Motor overheating (thermistor)
Converter overheating (thermal model) Check the ambient temperature.
High input voltage phase imbalance or
input phase loss
Converter overheating (Power module) Check the ambient temperature.
Various
Instruction book
Actions
Check the ambient temperature.
Check the cubicle cooling.
Contact Atlas Copco.
Check the ambient temperature.
Check the cubicle cooling.
Contact Atlas Copco.
Check the ambient temperature.
Clean the motor cooling fins.
Contact Atlas Copco.
Check the cubicle cooling.
Contact Atlas Copco.
Check supply phases.
Contact Atlas Copco.
Check the cubicle cooling.
Contact Atlas Copco.
Contact Atlas Copco.
API480496